Wiktionary
n. 1 a royal home in London, now the official residence of Prince Charles. 2 (context by extension English) the office of Prince Charles.
Wikipedia
Clarence House is a royal residence in London, situated on The Mall, in the City of Westminster. It is attached to St. James's Palace and shares the palace's garden. For nearly 50 years, from 1953 to 2002, it was home to Queen Elizabeth The Queen Mother. It has since been the official residence of Charles, Prince of Wales, and Camilla, Duchess of Cornwall. Clarence House also served as the official residence for Prince William from 2003 until his 2011 marriage and for Prince Harry from 2003 until 2012. It is open to visitors for approximately one month each summer, usually August, and is one of many royal buildings in London. Clarence House has been a Grade I listed building since 1970.
Since 2003, the term "Clarence House" has often been used as a metonym for the Prince of Wales's private office, the term "St. James's Palace" had been previously used.
Usage examples of "clarence house".
What a strange thing, I thought, that this particular work of his was considered so extraordinary that Queen Elizabeth The Queen Mother bought one of its five versions and hung it in Clarence House.
So large rugs had been removed from Clarence House and transported to Hell Close in the box van.
Each morning he went to a fencing master in Bond Street and each afternoon he shot with long-barrelled duelling pistols at targets in the yard of Clarence House.
ST JAMES'S PALACE and Clarence House to my left, the overgrown park and lake on my right Sally and me, we'd fed the swans in that park and laid together on the moist spring grass.